Cement fineness negative pressure screen analysis instrument

The utility model discloses a cement fineness negative pressure screen analysis instrument which comprises a device body, a screen analysis box is installed in the device body, transmission shafts are symmetrically installed on the surface of the inner wall of the screen analysis box, a screw is arranged in front of the two transmission shafts, and one end of one transmission shaft is movably connected with the inner wall of the screen analysis box. According to the screen analysis plate, the elastic belt, the mounting plate, the spring, the transmission shaft and the screw rod are matched for use, so that the working efficiency of the screen analysis plate is conveniently improved, a worker starts the stepping motor through the control panel during working, and then the stepping motor drives the screw rod to rotate through the transmission shaft; then the threaded sleeve drives the mounting plate to circularly move on the surface of the screw rod under the rotation of the screw rod, so that the mounting plat